Error400 Calling UploadFileAsync method

We have been encountering errors when calling Aspose APIs since this morning.
We have not made any changes to our code. These API calls have been working reliably for over a year and were functioning correctly until today.

A sample request URL is:
http://api.aspose.cloud/v3.0/pdf/storage/file/uploaded_xxxxxxxx/Invoice.pdf
This returns a 400 Bad Request error.

In the details section, we can see the following message:
Error: UploadFileAsync. Exception: IDX10503: Signature validation failed.

Could you please investigate and advise on the cause of this issue?

I have updated my SDK to the latest version and still have the same problem . I think there is something wrong on your side.

@conveysoft
Can you please share your sample document and code to reproduce the issue? We will further proceed to assist you accordingly.